I'm happy to be able to make this information public to the Linuxcommunity. This information has been previously released to BIOS /board vendors as an appnote, but in the interest of getting a workaroundinto the hands of users the quickest we're making it public for possibleinclusion into the Linux kernel.

Problem:C1 Halt Disconnect problem on nForce2 systems

Description:A hang is caused when the CPU generates a very fast CONNECT/HALT cyclesequence.

Workaround:Set the SYSTEM_IDLE_TIMEOUT to 80 ns. This allows the state-machine andtimer to return to a proper state within 80 ns of the CONNECT and probeappearing together.

Since the CPU will not issue another HALT within 80 ns of the initialHALT, the failure condition is avoided.

This will require changing the value for register at bus:0 dev:0 func:0offset 6c.